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KMID : 1007520020110060613
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Food Science and Biotechnology
2002 Volume.11 No. 6 p.613 ~ p.617
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Influence of Lodging on Chemical Composition and Contamination of Rice
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Pei, Shi Chun
Suh, Jung Kak/Lee, Won Jong/Kim, Suk Shin/Shin, Jin Chul
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Abstract
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Rice plants of three Japonica cultivars grown under normal conditions were completely lodged and submerged in water to examine the influence of lodging on the chemical composition and the degree of contamination. No significant difference in protein, starch, ash unlodged rices. Lodged paddy, brown, and milled rices were contaminated with mold at 76.6-100, 26.6-100 and 8.3-11.6%, whereas unlodged paddy, brown, milled rices showed 36.6-70, 0-13.3 and 3.3-8.3% of contamination, respectively, Average residual levels of edifenphos, phenthoate, pyridaphenthion, isoprothiolane were 5.0-6.5, 31-49, 0-38 and 1.3-1.6 μg/kg in lodged paddy rice, and 0-4, 11-36, 6-62 and 0-2.2 μg/kg in lodged paddy rice, respectively, far below the Korean maximum residue limits. A flatoxin was detected in only one lodged paddy rice sample at 1.7 μg/kg, also far below Korean maximum residue level. Deoxynivalenol was not detected in unloged paddy, brown, and milled rices, whereas 238-447, 242-577 and 247-323 μg/kg were detected in lodged paddy, brown and milled rices, respectively, far below the maximum residue limits of several countries.
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